How Much Do New Windows Cost in 2025?
The average cost to replace windows will depend on the number of windows that are being replaced, the type of windows that you are replacing, and your location in the UK.
Why's it so important to get your windows replaced then?
Having a new set of windows installed can really help to liven up the look and drastically improve energy efficiency to boot. It also adds value to your home.
Those based in the London area can expect to pay more for the work than those based in the North or other parts of the UK.
Nowadays, the options you have for getting your windows upgraded and replaced are much more varied and reasonably priced.
Let's take a look at the prices then...
Windows Replacement Prices
You can usually expect to pay around £450-£3,500 per window depending on the size and type of window as well as the materials used.
Below is a table showing window replacement prices for various different window replacement jobs:
| Window Type and Size (Installed) | Average Cost (2025) |
|---|---|
| uPVC window replacement 600mm x 900mm | £450 - £700 |
| uPVC window replacement 900mm x 1200mm | £550 - £900 |
| uPVC window replacement 1200mm x 1200mm | £650 - £1,100 |
| Timber window replacement 600mm x 900mm | £1,200 - £1,600 |
| Timber window replacement 900mm x 1200mm | £1,600 - £2,000 |
| Timber window replacement 1200mm x 1200mm | £1,800 - £2,200 |
| Aluminium window replacement 600mm x 900mm | £600 - £800 |
| Aluminium window replacement 900mm x 1200mm | £700 - £950 |
| Aluminium window replacement 1200mm x 1200mm | £800 - £1,050 |
| Composite window replacement 600mm x 900mm | £1,300 - £1,800 |
| Composite window replacement 900mm x 1200mm | £1,800 - £2,700 |
| Composite window replacement 1200mm x 1200mm | £2,200 - £3,500 |
- How Much Do New Windows Cost in 2025?
- What are the Supply Costs of Window Replacement?
- What are the Additional Costs of Replacing Windows?
- Tradesperson Costs for Window Replacement
- How Long Does It Take to Replace a Window?
- How do you measure for a bay window replacement?
- Types of Windows
- Benefits of Replacing Windows
- Planning Permission and Building Regulations
- How much Does It Cost to Remove a Window?
- FAQs
- Sources
What are the Supply Costs of Window Replacement?
If you are planning on buying your windows separately before hiring someone to install them for you, then you may be interested in the supply costs for windows.
Below is a table showing the various costs that you can expect for windows:
| Types of Supply | Average Price Per Window |
|---|---|
| uPVC windows | £250 - £650 |
| Aluminium windows | £350 - £750 |
| Timber windows | £800 - £1,800 |
| Composite windows | £950 - £2,500 |
What are the Additional Costs of Replacing Windows?
There are several additional costs that you may need to think about when it comes to replacing windows.
Below is a list of the additional things that you may need to budget for with this type of work:
Double Glazing
If you want to change all of the windows in your home and replace them with double glazing windows, this can be quite a large job. You will need to hire a professional to do this work for you.
The average cost of replacing all of the windows in your home with double glazing starts from approximately £6,000-£12,000 with prices varying depending on the number of windows being replaced, the type of frame and standard of glazing.
Triple Glazed Windows
With an additional pane of glass, triple glazing is another option, especially beneficial if you live in particularly noisy areas. For example near a railway or main road.
The average cost of fitting a semi-detached house with seven triple glazed windows is around £3,520 to £4,080 although this can vary and you may not decide to have all your windows done at once.
Window Seal Replacement
If it isn't already included as part of your new window replacement, then you may need to check on your window seals in the event of any damage or general wear and tear.
The cost of a window sill replacement is around £140-£220 including material and labour costs.
New Front Door
When you are replacing the windows in your home, then you may also be interested in replacing the front door of your home. This can improve the aesthetic appeal of your home and can also improve the security of the home.
The average cost of a new front door (including fitting) is around £300-£1000. The overall cost will depend on the materials used, and your location in the UK.
Home Security
When installing new windows in your home, you may also want to consider adding some additional security measures to your home.
You can install a home security system for around £165-£470. The overall cost of the work will depend on the size of the system, the type of system, and your location in the UK.
Tradesperson Costs for Window Replacement
If you are buying your windows in advance, then you may be interested in learning how much the contractors may charge to fit the new windows.
Most of the time, window fitters will work in pairs. They will usually charge around £250-£350 per day to replace the windows in your home.
If you are replacing just one window, then you may only require one contractor and they may charge an hourly rate, rather than a daily rate. If this is the case, then you can expect to pay around £25-£35 per hour.
However, it's worth noting that prices can be higher in areas such as London and the South East. You may also find costs vary depending on the type of installation, for example wooden/timber frames may require a specialist within the industry.
How Long Does It Take to Replace a Window?
When it comes to having new windows installed, you may also be curious about the timescales that you can expect for installing replacement windows.
On average, it will take a skilled pair of window installers around a day to install six windows at your home. If you are only having one single window replaced, then this may be done by just one installer, and will likely take around two hours to complete.
If you are looking to replace all of the windows on your property, then this may take around 2-3 days to complete. This will depend on how many windows you have, and how many people are working on the job.
How do you measure for a bay window replacement?
Below is a list of steps that you’ll need to take to measure a bay window:
- Measure the widths of the two windows forming the bay.
- Place the tape measure on the seam between the casing trim and the window frame.
- Extend the tape measure to the centre of the adjoining window joint and record this measurement.
- Hold the tip of the tape measure at the tops seam where the casing meets the frame.
- Pull the tape measure to the bottom seam and record the measurement.
- Repeat this measurement across the bay window to ensure you have the right height.
- To measure the centre window, place the tape measure at the centre of the joint with the left window.
- Extend the tape measure until you reach the centre of the joint on the right window and record this measurement.
- Double check all of the measurements again to ensure they are correct.
Types of Windows
There are several different types of windows that you can choose from for your home. Below is a list of the different types of windows that are popular in UK homes:
uPVC Windows Cost
uPVC windows are the most common, and most popular types of windows on UK homes. These windows usually come in double or triple glazing varieties, which is great for keeping out draughts and reducing your energy bills.
White uPVC is the most common variety of this type of window, however, you can get them in a range of colours to suit your home. This type of window usually costs around £250–£650 (supply only), or £450–£1,100 including installation.
Pros:
- Very durable
- Excellent insulator for keeping heat in
- Fire-retardant in the event of a emergency
- Provides more security than wooden windows
- Good value for money
Cons:
- Limited options for the colour
- Structural strength not as good as aluminium
- Due to being made from uPVC they can expand and contract
Aluminium Windows Cost
Installing aluminium window frames are a more luxurious style of window frames. These are more expensive, however, they are much more durable. These windows are less prone to warping and corrosion, and are becoming increasingly popular in UK homes. They also don’t require much maintenance, which is a huge benefit.
These windows usually cost around £350–£750 (supply only), or £600–£1,050 fully installed.
Pros:
- More durable than uPVC windows
- Long lasting and hard-wearing
- Relatively low maintenance
- Provide a modern appearance
Cons:
- Provides less thermal insulation than uPVC
- Can be an expensive investment
- Limited colour options compared to timber or uPVC
Wooden Windows Cost
timber window installation is also quite an expensive option, depending on the type of wood, design and style. If maintained properly, these windows can have a longer lifespan than uPVC windows. They also have the benefit of being easily repaired, if they become damaged.
Timber windows (wooden) usually cost around £800–£1,800 for supply only, and between £1,200–£2,200 installed.”
Pros:
- Can have a long-life span if maintained correctly
- Can be maintained and repaired
- They’re aesthetically pleasing
- Eco-friendly
Cons:
- Can rot if they’re not maintained properly
- Can be expensive
- Can be prone to draughts if they are not installed correctly
Composite Windows
Composite window installation provides modern and robust windows that combine multiple materials to improve performance, energy efficiency and longevity. Typically they have a timber core for natural insulation and strength and the outer layer is made of aluminum, uPVC or fibreglass to protect against weather damage and low maintenance.
The cost for composite window replacement is typically between £950–£2,500 for supply only, or between £1,300–£3,500 fully installed depending on size, design and finishing touches.
This combination makes composite windows warping, rotting or fading proof and suitable for both traditional and contemporary homes.
Pros:
- Durable & weather-resistant
- Can be maintained and repaired
- Low maintenance
- Energy efficient
- Aesthetic appeal
- Long lifespan
Cons:
- Higher initial cost
- Limited customisation
- Heavier frames
Roof Windows
A roof window is one that is installed in the roof to provide light to the home. These are popular in homes with a loft conversion, as this is the best way to allow light to enter the room.
A roof window will usually cost around £100-£1000, depending on the materials and the size of the window.
Pros:
- Maximises natural light
- Ideal for loft conversions or attic rooms
- Improves ventilation and aesthetics
- Available in various styles
- Modern options provide good thermal performance
- Can potential add value to your home
Cons:
- Installation can be complex and costly
- May sometimes require planning permission
- Can be harder to clean and access
Benefits of Replacing Windows
There are several benefits of replacing the windows in your home. Below is a list of the main advantages of this type of work:
Increased Home Value
If you choose to replace all of the windows in your home, this can really pay off in the long run. New windows don’t just look great, but they perform better as well.
Prospective buyers are much more likely to buy your home if the windows are new. Therefore, you can expect a good increase in your home value with this type of work.
Enhanced Home Security
Windows that are faulty, or painted shut are not only annoying, but they can also be a safety hazard. For example, if you need to escape your home due to a fire, a faulty window may prevent you from being able to escape out of the nearest exit.
When it comes to window replacement, the majority of modern options now include enhanced security features such as safety locks or laminated glazing. Additionally, a range of quality window frames are available to help provide you with that extra peace of mind.
Improved Energy Efficiency
New windows tend to be very well sealed, and may even come in high energy-efficiency options. This can help you to keep your home warmer in the winter months which means you won’t need to worry as much about heating your home. This can also result in lower energy bills.
Noise Reduction
According to various studies, noise pollution can be damaging to our health. New windows can help to combat noise pollution, and this can provide you with a more restful environment.
New windows can help you to reduce noise from the outside, such as lawnmowers, traffic, and barking dogs.
Enhanced Appearance
New windows can dramatically improve the appearance of your home, from both the inside and the outside. Windows can come in a range of styles, colours and designs so you can choose something that suits the aesthetic your home.
This improvement in appearance is also one of the reasons why new windows will increase the value of your home.
Planning Permission and Building Regulations
While planning permission isn't usually required when replacing windows in your own home, there are a couple of exceptions to the rule. If you live in a listed building or conservation area, then you may be subject to certain restrictions. In these instances, or if you are drastically changing the look of your property, it's always best to check with your local planning authority before starting any work.
If you hire a FENSA-registered installer (or the equivalent) then they will be able certify the window replacement meets all the legal requirements and building regulations. This includes meeting UK standards for thermal performance, safety measurements and required ventilation.
In the event you are unsure if you are covered, then you may need to apply for building control approval.
How much Does It Cost to Remove a Window?
Before you can install a new window, you will need to remove your old window first. If you are looking to pay someone to remove a window for you, you will need to hire a professional window fitter to complete this work for you.
The price that you will pay a professional window fitter to remove a window for you will depend on how long the job takes. Some windows are more difficult to remove than others.
The average cost that you can expect to pay for this type of work is around £25-£35 per hour, although prices may vary throughout the country with the likes of London and the South East being higher than the national average.
If you need to get rid of the waste yourself, then you may need to hire a skip which will cost around £100-£300.
FAQs
Q: What is the most secure type of window?
a: uPVC windows are popular in the UK, not only due to being the most affordable, but also due to some good security features that include multi-point locks and reinforced frames. However, aluminium windows are made from a stronger material and can be fitted with high-tech locking systems.
Q: What time of year is best for window replacements?
A: Any time of year is fine for a window replacement as long as the weather is suitable. However, summer is the best time for a window replacement, however, window fitters can be quite busy during these months. You may get cheaper quotes outside of the summer months, as the work tends to be more scarce during these months.
Q: What is a bow window?
A: A bow window is usually made up of four or five identical windows that are fitted at an angle of 10 degrees. This creates a beautiful curved appearance.
Q: What is a sash window?
A: Sash windows are associated with a more traditional look. These windows open vertically. They consist of two framed window sashes, one in front of the other and sash windows slide up and down to open.
Q: What is a casement window?
A: Casement windows have a hinge on the side, top, or bottom of the frame. This hinge allows the window to easily open outwards, providing a lot of ventilation in the home.
Q: What is a tilt and turn window?
A: Tilt and turn windows feature a mechanical hinge that opens on two axis. They usually have one handle that allows you to tilt the window to allow a breeze in. You can also turn the handle to open the window fully if you want complete ventilation.
Sources
- https://www.pella.com/ideas/windows/replacement/benefits-replacement-windows
- https://www.pjfitz.com/diy/window-installation/how-to-measure-a-bay-window
- https://www.hamiltonwindows.co.uk/most-secure-windows
- https://www.quickslide.co.uk/blog/guides/whats-difference-bay-bow-window
- https://www.gowercroft.co.uk/news/what-are-sash-windows
- https://www.everest.co.uk/double-glazing-windows/casement/what-are-casement-windows
- https://www.anglianhome.co.uk/double-glazing-windows/tilt-and-turn
